CN113253358A

CN113253358A - Device and method for identifying and cutting natural gas hydrate layer section in casing on site

Info

Publication number: CN113253358A
Application number: CN202110510297.6A
Authority: CN
Inventors: 李昂; 蔡峰; 李清; 闫桂京; 孙运宝; 董刚; 骆迪
Original assignee: Qingdao Institute of Marine Geology
Current assignee: Qingdao Institute of Marine Geology
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-08-13
Anticipated expiration: 2041-05-11
Also published as: CN113253358B

Abstract

The invention relates to the technical field of natural gas hydrate exploration, in particular to a device and a method for identifying and cutting a natural gas hydrate layer section in a casing on site. The device comprises a temperature measuring unit and a cutting unit horizontally arranged with the temperature measuring unit. The temperature measuring unit comprises a temperature measuring shell, a temperature measuring transparent cover, a movable temperature measuring mechanism, a temperature measuring pipe inlet, a temperature measuring pipe outlet and a sleeve pipe transmission mechanism. The cutting unit comprises a cutting shell, a cutting transparent cover, a movable sleeve clamping and cutting mechanism, a cutting pipe inlet, a cutting pipe outlet and an object carrying platform. The method can realize the identification-acquisition integrated operation of the hydrate-containing layer in the casing, improve the acquisition rate of the hydrate sample and reduce the loss of the hydrate in the process of acquiring the hydrate from the casing. In addition, the sampling accuracy is also improved by the constraint of actually measuring the temperature difference. The powder produced in the operation can be controlled in the equipment for centralized treatment, and the dust pollution on the construction site is avoided.

Description

Device and method for identifying and cutting natural gas hydrate layer section in casing on site

Technical Field

The invention relates to the technical field of natural gas hydrate exploration, in particular to a device and a method for identifying and cutting a natural gas hydrate layer section in a casing on site.

Background

Natural gas hydrate (hereinafter referred to as "hydrate") is regarded as a potential green clean energy in the 21 st century, and its commercial exploration and development technology has been an important direction for the exploration and development of governments. An important engineering node in the industrial process is to obtain a hydrate sample in a rock stratum below the seabed in a deep sea environment, the successful acquisition of the sample is the confirmation of the cognition of the occurrence rule of the hydrate in the previous stage and the verification of the accuracy of the acquired data, and the powerful support of physical test and scheme design is also provided for the trial production of the hydrate in the next engineering stage.

The hydrate physical sample is obtained by drilling on the seabed, and is stored in a cylindrical hollow sleeve after being obtained, and then is lifted to a construction ship or a platform through a winch. Before the sample is put into liquid nitrogen for long-term storage, sample identification needs to be carried out through a sleeve with poor transparency, and whether hydrate and specific occurrence layer of the hydrate exist or not is judged so as to carry out sleeve cutting and sample sealing. The above work is accomplished by temperature measurement and cutting of two separate sets of equipment and personnel. However, in field operation, hydrates can be decomposed automatically when exposed to air, and the efficiency of the prior art for accurately identifying and cutting hydrate samples in the casing is low, so that a large amount of loss of the hydrate samples occurs in the collection process, and the research and the test on the occurrence state of in-situ hydrates below the seabed in the subsequent work are influenced. In addition, the casing pipe does not have marks such as scales and the like for indicating a specific layer, so that the accuracy is not high when the layer is cut, and the loss of the hydrate sample is also caused.

Currently, there is no complete device and solution to directly accomplish the above work, and therefore, there is a need to design a device and method that can identify and cut out the natural gas hydrate interval in the casing in situ.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a device and a method for identifying and cutting a natural gas hydrate layer section in a casing on site.

The technical scheme of the invention is as follows:

a device for identifying and cutting natural gas hydrate layer sections in a casing on site comprises a temperature measuring unit and a cutting unit horizontally arranged with the temperature measuring unit. The temperature measuring unit comprises a temperature measuring shell, a temperature measuring transparent cover, a movable temperature measuring mechanism, a temperature measuring pipe inlet, a temperature measuring pipe outlet and a sleeve pipe transmission mechanism; the temperature measurement transparent cover is hinged to the temperature measurement shell, the movable temperature measurement mechanism is arranged at the upper end inside the temperature measurement shell, the temperature measurement inlet pipe is arranged on the side wall of the temperature measurement shell, the temperature measurement outlet pipe is arranged on the side wall of the temperature measurement shell opposite to the temperature measurement inlet pipe, and the temperature measurement inlet pipe and the temperature measurement outlet pipe are connected through the sleeve transmission mechanism. The cutting unit comprises a cutting shell, a cutting transparent cover, a movable sleeve clamping and cutting mechanism, a cutting pipe inlet, a cutting pipe outlet and an object carrying platform. The cutting transparent cover is hinged to the cutting shell, the movable sleeve clamping and cutting mechanism is arranged at the upper end inside the cutting shell, the cutting pipe inlet and the cutting pipe outlet are arranged on the side wall of the cutting shell and keep horizontal at the temperature measuring pipe inlet and the temperature measuring pipe outlet, and the carrying platform is arranged at the bottom end inside the cutting shell. The movable temperature measuring mechanism, the sleeve pipe transfer mechanism, the movable sleeve pipe clamping and cutting mechanism and the carrying platform are connected with the operation terminal.

Furthermore, the movable temperature measuring mechanism comprises a temperature detector and a temperature detector driving mechanism, and the temperature detector driving mechanism drives the temperature detector to horizontally reciprocate in the temperature measuring shell.

Furthermore, the temperature measurement driving mechanism comprises a first sliding guide rail, a first sliding block, a temperature measurement driving motor and a first driving chain, wherein the first sliding block is fixed on the first driving chain, the output end of the temperature measurement driving motor is connected with the first driving chain, and the first sliding block is arranged on the second sliding guide rail.

Further, the temperature detector is set as an infrared thermal imager.

Furthermore, the sleeve pipe transmission mechanism comprises a support, a transmission belt and a transmission driving motor, the support is fixed at the bottom of the temperature measuring shell, the transmission belt is arranged on the support, and the transmission driving motor drives the transmission belt to horizontally move on the support.

Further, the movable sleeve clamping and cutting mechanism comprises a movable sleeve caliper and a cutting electric saw, the movable sleeve caliper clamps the sleeve to move horizontally in the cutting unit, and the cutting electric saw cuts the sleeve after the position is determined.

Furthermore, but movable sleeve pipe calliper includes second sliding guide, second slider, sleeve pipe calliper removal driving motor and second drive chain, the second slider is fixed on second drive chain, sleeve pipe calliper removes driving motor's output and is connected with second drive chain, the second slider sets up on second sliding guide. The movable sleeve calipers can move up and down, the cutting electric saw is fixed on the second sliding guide rail, and the cutting electric saw can move up and down.

Further, the carrying platform is set to be a lifting carrying platform.

Further, still include supplementary wiper mechanism, supplementary wiper mechanism includes wash mouth and drain, the wash mouth sets up on the upper portion of cutting casing lateral wall, the drain sets up the bottom at the cutting casing.

A method for identifying and cutting a natural gas hydrate interval in a casing in situ, comprising the steps of:

A. temperature measurement pretreatment: the top and the bottom of the core casing are sealed, the outside of the casing is wiped, impurities adsorbed outside the casing are removed, the casing is transferred to a temperature measuring unit through a temperature measuring pipe inlet, and a temperature measuring transparent cover is closed.

B. The temperature was measured and recorded: and starting the temperature measurer, moving at a constant speed along the first sliding guide rail, scanning the temperature of the sleeve, recording data at the operation terminal and forming a temperature distribution graph.

C. Marking the cutting position: analyzing and measuring temperature data at an operation terminal, marking a layer with the temperature lower than that of surrounding rocks by more than 3 ℃, and inputting a cutting target position at the operation terminal.

D. Transferring a sleeve: adjusting the height of the carrying platform to make the height of the carrying platform consistent with the height of the sleeve pipe transfer mechanism, starting a transfer driving motor, moving the sleeve pipe out of the temperature measuring unit from the temperature measuring outlet pipe orifice, moving the sleeve pipe into the cutting unit through the cutting inlet pipe orifice, placing the sleeve pipe on the carrying platform, and closing the cutting transparent cover.

E. Cutting pretreatment: and adjusting the position of the movable sleeve clamp on the second sliding guide rail according to the cutting target position recorded in the operation terminal, descending and fixing the sleeve, and descending the loading platform to separate the loading platform from the sleeve.

F. Cutting a target: and cutting the sleeve by using a cutting electric saw according to the cutting target position recorded in the operation terminal, wherein the target position can fall to the loading platform.

G. And (3) recovery target: and opening the cutting transparent cover, recovering the cut sleeve target layer position on the carrying platform, sealing the top and bottom openings of the sleeve target layer position, and then storing the sleeve target layer position.

H. And (3) treating the rest sleeves: and lifting the carrying platform, loosening the movable sleeve calipers, and enabling the rest sleeves to fall to the carrying platform to be collected and processed.

I. Cleaning equipment: and cleaning the internal equipment of the cutting unit by using a high-pressure water gun, then closing the cutting transparent cover, and cleaning and drying the inside of the cutting unit through a cleaning opening.

The invention achieves the following beneficial effects:

1. the device and the method for identifying and cutting the natural gas hydrate layer section in the casing on site can realize the identification-acquisition integrated operation of the hydrate-containing layer position in the casing, improve the acquisition rate of a hydrate sample and reduce the loss of the hydrate in the process of acquiring the hydrate from the casing. In addition, the sampling accuracy is also improved by the constraint of actually measuring the temperature difference.

2. The device and the method for identifying and cutting the natural gas hydrate layer section in the casing on site convert manual operation into mechanical operation, and only two persons need to work together, so that the labor cost can be effectively reduced particularly under the condition of limited number of shipborne personnel.

3. The device and the method for identifying and cutting the natural gas hydrate layer section in the casing on site can control the powder generated in the operation in the equipment for centralized treatment, thereby avoiding the dust pollution on the construction site.

Drawings

FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention.

FIG. 2 is a schematic flow diagram of the process of the present invention.

In the figure, 1, a temperature measuring shell; 2. a temperature measuring transparent cover; 3. a first slider; 4. an infrared thermal imager; 5. a first sliding guide rail; 6. a temperature measurement driving motor; 7. measuring the temperature of the pipe inlet; 8. measuring the temperature of the outlet pipe; 9. a support; 10. a cannula delivery mechanism; 11. a transfer belt; 12. a transmission drive motor; 13. cutting the inlet pipe mouth; 14. cutting the shell; 15. cutting the transparent cover; 16. a second sliding guide rail; 17. cutting the electric saw; 18. a movable sleeve caliper; 19. a sleeve caliper movement driving motor; 20. cleaning the opening; 21. cutting the pipe orifice; 22. a carrier platform; 23. a sewage draining outlet; 24. a hydraulic telescopic rod; 25. and operating the terminal.

Detailed Description

To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.

As shown in fig. 1, an apparatus and method for identifying and cutting hydrates in casing is completed by two units of temperature measurement and cutting, wherein the temperature measurement unit comprises:

the temperature measurement shell 1 is used for assembling internal parts of the temperature measurement unit.

The temperature measurement transparent cover 2 is hinged with the temperature measurement shell 1 and can be opened, so that the measurement condition of the internal sample can be observed conveniently.

A temperature measuring inlet pipe orifice 7 and a temperature measuring outlet pipe orifice 8 are used for transferring the core sleeve into the temperature measuring shell 1 and an opening of the taking-out equipment.

The first sliding guide rail 5 is provided with a first sliding block 3 on the first sliding guide rail 5, the first sliding block 3 is used for suspending a temperature measuring device, the temperature measuring device adopted by the embodiment is an infrared thermal imager 4, and the infrared thermal imager 4 can be connected to the first sliding guide rail 5 through a temperature measuring driving motor 6 to drive a first driving chain to slide on the first sliding guide rail 5, so that the casing can be conveniently scanned at full length. Of course, the driving manner for driving the thermal infrared imager 4 to reciprocate horizontally in the thermometric housing 1 is not limited to this in the present embodiment. The linear guide rail driving or other existing horizontal reciprocating driving modes can be adopted. The temperature measurement driving motor 6 and the infrared thermal imager 4 are connected with the operation terminal 25. The infrared thermal imager 4 is used for fast scanning to form a digital and integrated result, so that the time waste caused by manual repeated identification time is reduced, the speed and the precision of hydrate identification are improved, and the waste of hydrate samples caused by self decomposition along with time is reduced.

And the sleeve pipe transmission mechanism 10 is used for accommodating and transmitting the sleeve pipes, transmitting the sleeve pipes to the cutting unit after the temperature data are acquired, transmitting the sleeve pipes through a transmission belt 11 and providing power by a transmission driving motor 12, and the bottom of the sleeve pipe transmission mechanism is fixed with the temperature measurement shell 1 by a support 9. Of course, the manner of implementing the horizontal transmission of the sleeve is not limited to the above horizontal transmission, and a manner of further driving the sleeve disposed thereon to move horizontally by the rotation of the driving roller and other existing manners are also possible. The cannula transmission mechanism 10 is connected to an operator terminal 25.

The cutting unit includes:

and cutting the shell 14, and packaging the cut parts inside the cutting unit.

The cutting transparent cover 15 is hinged with the cutting shell 14 and can be opened, so that the cutting condition of the internal sample can be conveniently observed, and the sample can be collected after the cutting is finished.

A cutting-in nozzle 13 and a cutting-out nozzle 21 for the core casing transfer into the cutting housing 14 and the opening of the extraction device.

And a second slide rail 16 for suspending the movable casing clamp 18 and the cutting electric saw 17, and the movable casing clamp 18 and the cutting electric saw 17 are slidable on the second slide rail 16. Wherein the movable casing calliper 18 is used to fix the casing position before cutting and the cutting saw 17 is used to cut the casing and internal rock. Specifically, the movable sleeve caliper 18 includes a second sliding guide rail 16, a second slider, a sleeve caliper movement driving motor 19 and a second driving chain, the second slider is fixed on the second driving chain, an output end of the sleeve caliper movement driving motor 19 is connected with the second driving chain, and the second slider is disposed on the second sliding guide rail 16. The movable sleeve caliper 18 is movable up and down. In order to facilitate a stable gripping movement of the cannula, in this embodiment, the number of the movable calipers is set to 4. The cutting electric saw 17 is fixed on the second sliding guide rail 16, and the cutting electric saw 17 can move up and down. The sleeve caliper movement drive motor 19, the movable sleeve caliper 18 and the cutting electric saw 17 are connected to an operation terminal 25.

The object carrying platform 22 can be lifted. The sleeve pipe that is used for placeeing the temperature measurement unit transmission and comes stabilizes the sleeve pipe position, makes things convenient for portable sleeve pipe calliper 18 further fixed sleeve pipe. Specifically, a hydraulic telescopic rod 24 is arranged at the lower end of the loading platform 22. The lifting of the hydraulic telescopic rod 24 controls the up-and-down lifting movement of the loading platform 22. The hydraulic telescopic rod 24 is connected with an operation terminal 25.

And a cleaning opening 20 for cleaning the inside of the cutting unit after the cutting operation is completed, and then drying the inside. A drain 23 for washing water and dust bubbles is provided at the bottom of the cutting housing 14.

As shown in fig. 2, the step of using the apparatus to obtain a hydrate horizon sample from a core casing comprises:

A. temperature measurement pretreatment: the top and the bottom of the core casing are sealed, the outside of the casing is wiped, impurities adsorbed outside the casing are removed, the casing is transferred to a temperature measuring unit through a temperature measuring inlet pipe orifice 7, and the temperature measuring transparent cover 2 is closed.

B. The temperature was measured and recorded: and starting the temperature detector, moving at a constant speed along the first sliding guide rail 5, scanning the temperature of the sleeve, recording data at the operation terminal and forming a temperature distribution graph.

D. Transferring a sleeve: the height of the object carrying platform 22 is adjusted to be consistent with that of the sleeve pipe transmission mechanism 10, the transmission driving motor 12 is started, the sleeve pipe is moved out of the temperature measuring unit from the temperature measuring outlet pipe orifice 8, and is moved into the cutting unit through the cutting inlet pipe orifice 13, placed on the object carrying platform 22, and the cutting transparent cover 15 is closed.

E. Cutting pretreatment: the position of the movable sleeve caliper 18 on the second slide rail 16 is adjusted according to the cutting target position recorded in the operation terminal, and the sleeve is lowered and fixed, and the stage 22 is lowered to be disengaged from the sleeve.

F. Cutting a target: the casing pipe is cut by the cutting electric saw 17 according to the cutting target position recorded in the operation terminal, and the target position falls to the carrying platform 22.

G. And (3) recovery target: the cutting transparent cover 15 is opened, the cut casing target position is recovered on the loading platform 22, the top and bottom openings are sealed, and then the casing target position is stored.

H. And (3) treating the rest sleeves: the carrier platform 22 is raised and the movable sleeve calliper 18 released and the remaining sleeves will fall to the carrier platform 22 where they are collected and disposed of.

I. Cleaning equipment: the internal equipment of the cutting unit is cleaned by using a high-pressure water gun, then the cutting transparent cover 15 is closed, and the inside of the cutting unit is cleaned and dried through the cleaning opening 20.

In the actual operation process, the existing operation mode needs about 30min to obtain a sample from the casing, and two three-person groups are needed for matching. Moreover, the field operation has a great amount of dust pollution. During construction at night, insufficient outdoor illumination can cause missed judgment and erroneous judgment of hydrate sample identification. One sleeve can be processed within 10min by the conventional device and method, and only two persons are required to operate simultaneously. The operation efficiency is high. Moreover, the contact between the flying mud and the casing powder and the human body during cutting is avoided. The operation can be carried out in the daytime and at night without depending on the working environment on site.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An apparatus for identifying and cutting a natural gas hydrate interval in a casing on site, comprising: comprises a temperature measuring unit and a cutting unit horizontally arranged with the temperature measuring unit; the temperature measuring unit comprises a temperature measuring shell (1), a temperature measuring transparent cover (2), a movable temperature measuring mechanism, a temperature measuring pipe inlet (7), a temperature measuring pipe outlet (8) and a sleeve pipe transmission mechanism; the temperature measurement transparent cover (2) is hinged to the temperature measurement shell (1), the movable temperature measurement mechanism is arranged at the upper end inside the temperature measurement shell (1), the temperature measurement inlet pipe orifice (7) is arranged on the side wall of the temperature measurement shell (1), the temperature measurement outlet pipe orifice (8) is arranged on the side wall of the temperature measurement shell (1) opposite to the temperature measurement inlet pipe orifice (7), and the temperature measurement inlet pipe orifice (7) and the temperature measurement outlet pipe orifice (8) are connected through a sleeve pipe transmission mechanism; the cutting unit comprises a cutting shell (14), a cutting transparent cover (15), a movable sleeve clamping and cutting mechanism, a cutting inlet pipe orifice (13), a cutting pipe orifice (21) and a loading platform (22); the cutting transparent cover (15) is hinged to the cutting shell (14), the movable sleeve clamping and cutting mechanism is arranged at the upper end inside the cutting shell (14), the cutting inlet pipe orifice (13) and the cutting pipe orifice (21) are arranged on the side wall of the cutting shell (14) and are kept horizontal to the temperature measurement inlet pipe orifice (7) and the temperature measurement outlet pipe orifice (8), and the carrying platform (22) is arranged at the bottom end inside the cutting shell (14); the mobile temperature measuring mechanism, the sleeve transferring mechanism, the mobile sleeve clamping and cutting mechanism and the carrying platform (22) are connected with an operation terminal (25).

2. The device for identifying and cutting natural gas hydrate intervals in the casing on site according to claim 1, wherein the device comprises: the movable temperature measuring mechanism comprises a temperature detector and a temperature detector driving mechanism, and the temperature detector driving mechanism drives the temperature detector to horizontally reciprocate in the temperature measuring shell (1).

3. The device for identifying and cutting natural gas hydrate intervals in the casing on site according to claim 2, wherein the device comprises: the temperature measurement driving mechanism comprises a first sliding guide rail (5), a first sliding block (3), a temperature measurement driving motor (6) and a first driving chain, the first sliding block (3) is fixed on the first driving chain, the output end of the temperature measurement driving motor (6) is connected with the first driving chain, and the first sliding block (3) is arranged on a second sliding guide rail (16).

4. The device for identifying and cutting off natural gas hydrate intervals in the casing on site according to claim 2 or 3, wherein the device comprises: the temperature detector is set as an infrared thermal imager (4).

5. The device for identifying and cutting natural gas hydrate intervals in the casing on site according to claim 1, wherein the device comprises: the sleeve pipe transmission mechanism comprises a support (9), a transmission belt (11) and a transmission driving motor (12), wherein the support (9) is fixed at the bottom of the temperature measurement shell (1), the transmission belt (11) is arranged on the support (9), and the transmission driving motor (12) drives the transmission belt (11) to horizontally move on the support (9).

6. The method for identifying and cutting natural gas hydrate intervals in a casing on site according to claim 1, wherein the natural gas hydrate intervals are selected from the group consisting of: the movable sleeve clamping and cutting mechanism comprises a movable sleeve caliper (18) and a cutting electric saw (17), wherein the movable sleeve caliper (18) clamps a sleeve to move horizontally in a cutting unit, and the cutting electric saw (17) cuts the sleeve after the position is determined.

7. The device for identifying and cutting natural gas hydrate intervals in the casing on site according to claim 6, wherein the device comprises: the movable sleeve caliper (18) comprises a second sliding guide rail (16), a second sliding block, a sleeve caliper moving driving motor (19) and a second driving chain, the second sliding block is fixed on the second driving chain, the output end of the sleeve caliper moving driving motor (19) is connected with the second driving chain, and the second sliding block is arranged on the second sliding guide rail (16); the movable sleeve caliper (18) can move up and down, the cutting electric saw (17) is fixed on the second sliding guide rail (16), and the cutting electric saw (17) can move up and down.

8. The device for identifying and cutting natural gas hydrate intervals in the casing on site according to claim 1, wherein the device comprises: the loading platform (22) is arranged to be a lifting loading platform (22).

9. The device for identifying and cutting natural gas hydrate intervals in the casing on site according to claim 1, wherein the device comprises: still include supplementary wiper mechanism, supplementary wiper mechanism includes wash mouth (20) and drain (23), wash mouth (20) set up the upper portion at cutting casing (14) lateral wall, drain (23) set up the bottom at cutting casing (14).

10. A method for identifying and cutting a natural gas hydrate interval in a casing in situ, comprising the apparatus of any one of claims 1 to 9, and in particular comprising the steps of:

A. temperature measurement pretreatment: sealing the top and the bottom of the core casing, wiping the outside of the casing, removing impurities adsorbed on the outside of the casing, transferring the casing into a temperature measuring unit through a temperature measuring inlet (7), and closing a temperature measuring transparent cover (2);

B. the temperature was measured and recorded: starting a temperature detector, moving at a constant speed along a first sliding guide rail (5), scanning the temperature of the sleeve, recording data at an operation terminal (25) and forming a temperature distribution graph;

C. marking the cutting position: analyzing the measured temperature data at the operation terminal (25), marking the layer with the temperature lower than the surrounding rock by more than 3 ℃, and inputting the cutting target position at the operation terminal (25);

D. transferring a sleeve: adjusting the height of the objective platform (22) to be consistent with the height of the sleeve pipe transfer mechanism (10), starting a transfer driving motor (12), moving the sleeve pipe out of the temperature measuring unit from the temperature measuring pipe outlet (8), moving the sleeve pipe into the cutting unit through the cutting pipe inlet (13), placing the sleeve pipe on the objective platform (22), and closing the cutting transparent cover (15);

E. cutting pretreatment: according to the cutting target position recorded in the operation terminal (25), adjusting the position of the movable sleeve caliper (18) on the second sliding guide rail (16), descending and fixing the sleeve, and descending the loading platform (22) to separate the sleeve;

F. cutting a target: cutting the casing by using a cutting electric saw (17) according to a cutting target position recorded in an operation terminal (25), wherein the target position can fall to a loading platform (22);

G. and (3) recovery target: opening a cutting transparent cover (15), recovering a cut sleeve target layer position on a carrying platform (22), sealing top and bottom openings of the sleeve, and then storing;

H. and (3) treating the rest sleeves: lifting the carrier platform (22), releasing the movable sleeve caliper (18), and allowing the rest of the sleeves to fall to the carrier platform (22) for collection and processing;

I. cleaning equipment: and cleaning equipment in the cutting unit by using a high-pressure water gun, then closing the cutting transparent cover (15), and cleaning and drying the inside of the cutting unit through a cleaning opening (20).